Molekula

Sodium selenite pentahydrate

SKU 22117374 CAS 26970-82-1 Na2O3Se · 5H2O MW 263.01 In stock

Sodium selenite pentahydrate is a water-soluble selenium compound used in nutritional supplements, research, and as a reagent in biochemical studies. It provides bioavailable selenium for metabolic processes. CAS: 26970-82-1, Molecular Formula: Na₂O₃Se · 5H₂O, Molecular Weight: 263.01 g/mol, Storage: Ambient, Signal Word: Danger. Molekula supplies Sodium selenite pentahydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

CoA by batch Download specification

Overview

Pricing & pack sizes

Pack sizes & pricing

£ GBP € EUR $ USD

100 g — £60.70 per pack
500 g — £199.60 per pack

Prices exclude VAT/sales tax and shipping. Bulk and custom pack sizes available on request.

Specifications

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Property	Value
Appearance	White crystalline powder
pH	9.8 - 10.8
Loss on Drying	≤1.0%
Solubility	Freely soluble in water, practically insoluble in Ethanol
Assay	≥99%
Carbonate	≤0.01%
Nitrate	≤0.01%
Iron (Fe)	≤50ppm
Conclusion:	BP 2012
Lead (Pb)	≤20ppm
Arsenic (As)	≤10ppm
Insoluble Residue	≤0.15%
Selenate and sulphate	≤0.03%
Chloride(Cl)	≤0.01%

Storage & handling

Property	Value
Storage Temperature	Ambient
Transport Class	6.1
Packing Group	I
Shelf Life	24 months
Acidity	Base

Identification

Property	Value
SKU	22117374
CAS Number	26970-82-1
Molecular Formula	Na2O3Se · 5H2O
Molecular Weight	263.01
SMILES	[Na].O=[Se](O)O.O
EC / UN Number	2630
REACH Code	Y110
HTS Code	2842.90.9010
Tariff Code	2842901090

Safety & GHS

Danger

Toxic GHS06
Health Hazard GHS07
Hazardous to the Environment GHS09

Hazard statements

EUH031 Contact with acids liberates toxic gas
H300 Fatal if swallowed
H317 May cause an allergic skin reaction
H330 Fatal if inhaled
H411 Toxic to aquatic life with long lasting effects

Precautionary statements

P260 Do not breathe dust/fume/gas/mist/vapours/spray
P273 Avoid release to the environment
P280 Wear protective gloves/protective clothing/eye protection/face protection
P284 Wear respiratory protection
P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
P308+313 IF exposed or concerned: Get medical advice/attention

For research and industrial use only

Not for use in food, drugs, household, or in or on humans or animals. Consult the Safety Data Sheet before handling.

Documents

Safety Data Sheets (SDS)

Available in PT, FR, ES, DE, IT, EN.

Certificate of Analysis (CoA) by batch

Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.

Synonyms

No alternate names recorded for this product.

Frequently asked questions

What is sodium selenite pentahydrate used for?

It is primarily used as a selenium source in nutritional supplements, animal feed, and research applications requiring trace selenium.

What is the chemical formula and molecular weight of sodium selenite pentahydrate?

The formula is Na2O3Se · 5H2O with a molecular weight of 263.01 g/mol.

How should sodium selenite pentahydrate be stored?

It should be stored at ambient temperature, protected from moisture and light.

What grade is available for sodium selenite pentahydrate?

Available in research grade; specific industrial or pharmaceutical grades are not specified.

Can Molekula supply sodium selenite pentahydrate in bulk?

Yes, Molekula can supply bulk quantities—please contact sales for pricing and availability.

What documentation comes with an order of sodium selenite pentahydrate?

Each order includes a Certificate of Analysis (CoA); SDS is available upon request.

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